Khan Bonyak of Mongolia

Khan Bonyak of Mongolia (800-860) was the first Khan of the Yenisei Kirghiz, reigning from 847 to 860. He preceded Khan Bonek of Mongolia.

Biography
Bonyak was born in 800 to the Tengri Kyrgyz Yenisei Kirghiz tribe, and he became a leader of the Yenisei Kirghiz. It is possible that he was the leader of the 80,000 Kirghiz horsemen that invaded the Uyghur Khaganate in 840 to dethrone Khan Kurebir of Mongolia and that he was responsible for the destruction of numerous Uyghur cities. In 847 the last legitimate Uyghur khan, Khan Oge of Mongolia, was assassinated, letting the Yenisei Kirghiz conquer their empire. Bonyak reigned until his death in 860, and he was succeeded by his son Khan Bonek of Mongolia.